OregonFlora species comparison

nodes terete, 0–1 exserted.

intra- and extravaginal or mainly intravaginal.

extra- and intravaginal.

sheaths closed to 25% of their length;

ligules 1–3 mm;

blades flat or folded, or slightly inrolled, 0.5–2 mm wide.

sheaths closed 33–50% of their length, bases of basal sheaths glabrous, collars of at least some leaves usually sparsely short-hairy;

ligules 1–2 mm, blades of tillers to 40 cm long;

upper surface moderately to densely scabrous or minutely hairy on and between the veins;

cauline blades involute, 1–3 mm wide;

lower surfaces smooth;

upper surfaces sometimes sparsely hairy;

blades much reduced higher on the culm; uppermost blades 1–4.5 cm.

erect, contracted, 1–3 cm long, usually exserted from the sheaths;

branches erect to steeply ascending; slender; to 1.5 cm.

erect to nodding, lanceoloid to ovoid, loosely contracted; sparse, 4–8 cm;

spikelets 18–60;

branches ascending; lax, 3–8 cm long, 1–2 per node, with 3–8 spikelets.

3–4 mm, green or purple;

florets 2–3;

rachilla internodes less than 1 mm long; smooth.

6–9(11)mm; to 3 times as long as wide;

florets 2–5(7);

rachilla internodes 1–2 mm long.

lanceolate to broadly lanceolate, 2.4– 3.6(4) mm, usually equaling or exceeding the lowest lemma, frequently exceeding the upper florets;

lower glumes 3-veined.

subequal;

lower glumes 3-veined.

glabrous.

with diffuse; soft cobwebby hairs about 50% as long as the lemma.

lanceolate, 2.5–3 mm long, distinctly keeled; thin, glabrous;

keels and marginal veins rarely sparsely puberulent;

tips acute.

lanceolate, 4–6(7)mm, distinctly keeled, glabrous throughout; smooth or sparsely to moderately finely scabrous;

keels scabrous;

tips acute.

0.2–0.8 mm.

vestigial and 0.1–0.2 mm, or 2–3 mm.

=14.

=28.